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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 5, Iss. 14 — Nov. 16, 2010

Sensitive Chemiluminescence Determination of Thirteen Cephalosporin Antibiotics with Luminol–Copper(II) Reaction

Jianxiu Du and Hong Li

Applied Spectroscopy, Vol. 64, Issue 10, pp. 1154-1159 (2010)


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Abstract

A new chemiluminescence reaction, the luminol–Cu2+ reaction, was investigated for the determination of thirteen (13) cephalosporin antibiotics, namely cefalexin, cefadroxil, cefradine, cefazolin sodium, cefaclor, cefuroxime axetil, cefotaxime sodium, cefoperazone sodium, ceftriaxone sodium, ceftazidime, cefetamet pivoxil hydrochloride, cefixime, and cefpodoxime. It was found that, without adding any special oxidant, strong chemiluminescent (CL) signal could be produced from the reaction of the alkaline luminol with the above-mentioned antibiotics in the presence of Cu2+. The experimental conditions for the reaction were carefully optimized with flow-injection mode. The detection limits are 0.3 ng/mL cefalexin, 3 ng/mL cefadroxil, 0.3 ng/mL cefradine, 0.02 μg/mL cefazolin sodium, 0.8 ng/mL cefaclor, 0.02 μg/mL cefuroxime axetil, 5 ng/mL cefotaxime sodium, 0.02 μg/mL cefoperazone sodium, 0.8 ng/mL ceftriaxone sodium, 1 ng/mL ceftazidime, 0.08 ng/mL cefetamet pivoxil hydrochloride, 0.8 ng/mL cefixime, and 2 ng/mL cefpodoxime. The proposed method was validated by direct application to commercial formulations and spiked milk samples containing cefradine. A possible reaction mechanism is also discussed.

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Vol. 5, Iss. 14 Virtual Journal for Biomedical Optics

Citation
Jianxiu Du and Hong Li, "Sensitive Chemiluminescence Determination of Thirteen Cephalosporin Antibiotics with Luminol–Copper(II) Reaction," Appl. Spectrosc. 64, 1154-1159 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-64-10-1154

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